Implement WebFrameScheduler and WebPageScheduler

components/scheduler/child/scheduler_helper.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SCHEDULER_CHILD_SCHEDULER_HELPER_H_
 #define COMPONENTS_SCHEDULER_CHILD_SCHEDULER_HELPER_H_
 
 #include "components/scheduler/child/task_queue_manager.h"
 #include "components/scheduler/child/task_queue_selector.h"
 #include "components/scheduler/scheduler_export.h"
@@ skipping 44 matching lines @@
   // Returns true if Shutdown() has been called. Otherwise returns false.
   bool IsShutdown() const { return !task_queue_manager_.get(); }
 
   void CheckOnValidThread() const {
     DCHECK(thread_checker_.CalledOnValidThread());
   }
 
   // Creates a new TaskQueue with the given |spec|.
   scoped_refptr<TaskQueue> NewTaskQueue(const TaskQueue::Spec& spec);
 
+  // Unregisters a TaskQueue previously created by |NewTaskQueue()|.
+  void UnregisterTaskQueue(scoped_refptr<TaskQueue>& task_queue);
+
   // Accessor methods.
   base::TimeTicks Now() const;
   base::TimeTicks NextPendingDelayedTaskRunTime() const;
   bool GetAndClearSystemIsQuiescentBit();
 
   // Test helpers.
   void SetTimeSourceForTesting(scoped_ptr<base::TickClock> time_source);
   void SetWorkBatchSizeForTesting(size_t work_batch_size);
   TaskQueueManager* GetTaskQueueManagerForTesting();
 
@@ skipping 11 matching lines @@
 
   const char* tracing_category_;
   const char* disabled_by_default_tracing_category_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerHelper);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_CHILD_SCHEDULER_HELPER_H_